Improvement in car-brakes



s. MCCAMBRIDGE,

Car Brake.

Patented Nov. 28, 1865.

WASHINGTON D C UNITED STATES PATENT OFFICE.

IMPROVEMENT IN CAR-BRAKES.

Specification forming part of Letters Patent N0. 5] ,204 dated November28, 1865.

To all whom "it may concern:

Beit known that I, SAMUEL MGCAMBRIDGE, of the city and county ofPhiladelphia, and State of Pennsylvania, have invented a new and usefulImprovement in Oar-Brakes; and I do hereby declare that the following isa full, clear, and exact description of the construction and operationof the same, reference being had to the annexed drawings, making a partof this specification, in which- Figure 1 is a perspective view ot'atruck with the improved brake in connection therewith. Fig. 2 is afaceview of one of the gnide pieces I. Fig. 3 is an edge view of same.

Like letters in all the figures indicate the same parts.

The nature of my invention and improvement consists in operatingcar-brakes by means ofa belt, which is actuated by a pulley on one ofthe axles of a car or tender, in the manner I will proceed to describe.

I usually combine the parts for operating the brake with a tender andconnect the brakes for the whole train of cars in the usual manner; butto show the peculiar construction and arrangement of the improved brakeI have represented the improvement on an ordinary truck.

In the drawings, A represezts the truck. B B B B are the wheels on theaxles G G. 1) is a pulley on the shaft 0, and D is a pulley on thecounter-shaft E.

There is a belt, D, for operating the brake, which passes over thepulleys D and D, communicating force from the axle or shaft 0 to thecounter-shaft E, the said force being imparted to the brake by meanswhich I will presently describe. The belt is slack except when the brakeis to be brought into action. It is tightened by means of the cams F Fon the lever-shaft G bein g brought into action against thejournal-boxes H H of the counter-shaft E, which slide in the slots a ofthe guide-pieces I I, one of which pieces is represented in Figs. 2 and3. The-holes b b I) b of the-said guidepieces are for the purpose ofsecuring them by means of screws or bolts to the inner sides of the sidepieces of the truckframe. The holes 0 are for the reception of thejournals of the shaft G.

J is a lever attached to the said shaft G, for operating the cams F F.

K is a bar to which the check-blocks are attached, to check the adjacentWheels B B. The ends of the cord L are secured to the said bar K bymeans of the hooks d d, and the middle of the cord is fastened to thecounter-shaft E.

The operation is as follows: When the car or train is to be checked thebrakeman takes hold of the lever J and moves the handle backward, whichcauses the shaft G to turn in the direction of the arrow and the cams FF to bear against the journal-boxes H H of the counter-shaft E, forcingthe springs M, which bear against said boxes, forward, and tighteningthe belt D, which is then set in motion by means of the revolution ofthe shaft C, so as to revolve the shaft E and wind up the cord Ltightly, thus forcing the check-blocks attached to the bar K against thecontiguous wheels B B and checking their motion. In like manner all thewheels of a train may be checked by connecting their check-blocks in anyconvenient manner with the bar K.

A shifter and loose pulley may be used, if desired, for slacking andtightening the belt 1), instead of the shaft G and cams F F.

It'the belt D should not, under all circumstances, be found suflicientfor the purpose, there may be an intermediate shaft employed, connectedto the shaft E by means of a wheel and pinion, the pulley D beingsecured on said intermediate shaft.

What I claim as my invention, and desirt to secure by Letters Patent,is-- 1. The combination and arrangement of the counter-shaft E and leverJ with the shaft 0 by means of the belt D and pulleys D1), substantiallyin the manner described, and for the purpose specified.

2. The combination and arrangementof th lever J, shaft G, belt D, shaft0, and earns FF with the counter-shaft E, substantially as described,and for the purpose set forth.

In testimony that the above is my invention I have hereunto set my handand aflixed my seal this 11th day of September, 1865.

SAMUEL MGOAMBRIDGE. [L. s.]

Witnesses: J AS. 0. BoWERs, STEPHEN Us'rIoK.

